There's no option for Brew on the Mac, but you might not care since all but one of the North American carriers and most of the carriers around the world support J2ME, and most of those support it exclusively.

That said, you can write your J2ME games for free (with our toolkit or Sun's; Brew charges $$$), demo them from your website with our player for free, list them in our catalog for free, and enable them for purchase through our partnership with Handango (where you get ~70%). So we think J2ME is a pretty good platform for writing games.